Change in Biotypic Diversity of Russian Wheat Aphid (Hemiptera: Aphididae) Populations in the United States
| Autor: | J. S. Armstrong, Scott J. Nicholson, Tim L. Springer, G. J. Michaels, E. D. Bynum, Frank B. Peairs, Dolores W. Mornhinweg, Terri L. Randolph, Gary J. Puterka, Kristopher L. Giles, Robert W. Hammon, M. J. Brown |
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| Rok vydání: | 2014 |
| Předmět: |
Aphid
Ecology food and beverages Sowing Aphididae Hordeum General Medicine biochemical phenomena metabolism and nutrition Biology Plant disease resistance biology.organism_classification medicine.disease_cause Hemiptera United States Agronomy Insect Science Aphids Infestation medicine Animals Cultivar Russian wheat aphid Triticum |
| Zdroj: | Journal of economic entomology. 108(2) |
| ISSN: | 0022-0493 |
| Popis: | A key component of Russian wheat aphid, Diuraphis noxia (Kurdjumov), management has been through planting resistant wheat cultivars. A new biotype, RWA2, appeared in 2003 which caused widespread damage to wheat cultivars containing the Dn4 gene. Biotypic diversity in Russian wheat aphid populations has not been addressed since 2005 when RWA2 dominated the biotype complex. Our objectives were to determine the biotypic diversity in the Central Great Plains and Colorado Plateau at regional (2010, 2011, 2013) and local (2012) levels and detect the presence of new Russian wheat aphid biotypes. Regional and within-field aphid collections were screened against Russian wheat aphid-resistant wheat genotypes containing genes Dn3, Dn4, Dn6, Dn7, Dn9, CI2401; and resistant barley STARS 9301B. In 2010, all aphid collections from Texas were avirulent to the Dn4 resistance gene in wheat. Regional results revealed Dn4 avirulent RWA6 was widespread (55-84%) in populations infesting wheat in both regions. Biotypes RWA1, 2, and 3/7 were equally represented with percentages |
| Databáze: | OpenAIRE |
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